From 52c58c46f7c9c7aced3a5eb174c88d444a6d8a57 Mon Sep 17 00:00:00 2001
From: Selene ToyKeeper
Date: Sat, 21 Mar 2020 21:03:42 -0600
Subject: fixed potential eeprom corruption after turning boost/opamp chip
 on/off (some boost chips can make power unstable for a few ms, so we have to
 wait before accessing eeprom)

---
 spaghetti-monster/fsm-eeprom.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'spaghetti-monster')

diff --git a/spaghetti-monster/fsm-eeprom.c b/spaghetti-monster/fsm-eeprom.c
index 277e2b2..77352cf 100644
--- a/spaghetti-monster/fsm-eeprom.c
+++ b/spaghetti-monster/fsm-eeprom.c
@@ -30,6 +30,10 @@ uint8_t eeprom[EEPROM_BYTES];
 #endif
 
 uint8_t load_eeprom() {
+    #ifdef LED_ENABLE_PIN
+    delay_4ms(2);  // wait for power to stabilize
+    #endif
+
     cli();
     // check if eeprom has been initialized; abort if it hasn't
     uint8_t marker = eeprom_read_byte((uint8_t *)EEP_START);
@@ -44,6 +48,10 @@ uint8_t load_eeprom() {
 }
 
 void save_eeprom() {
+    #ifdef LED_ENABLE_PIN
+    delay_4ms(2);  // wait for power to stabilize
+    #endif
+
     cli();
 
     // save the actual data
@@ -62,6 +70,10 @@ uint8_t eeprom_wl[EEPROM_WL_BYTES];
 EEP_OFFSET_T eep_wl_prev_offset;
 
 uint8_t load_eeprom_wl() {
+    #ifdef LED_ENABLE_PIN
+    delay_4ms(2);  // wait for power to stabilize
+    #endif
+
     cli();
     // check if eeprom has been initialized; abort if it hasn't
     uint8_t found = 0;
@@ -87,6 +99,10 @@ uint8_t load_eeprom_wl() {
 }
 
 void save_eeprom_wl() {
+    #ifdef LED_ENABLE_PIN
+    delay_4ms(2);  // wait for power to stabilize
+    #endif
+
     cli();
     // erase old state
     EEP_OFFSET_T offset = eep_wl_prev_offset;
-- 
cgit v1.2.3